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This is the complete Adversus haereses (Against Heresies) Perhaps the most popular work by Saint Irenaeus. It is the name of a two-volume work against Gnosticism (and other Christian heresies), written about AD 180 by the Church Father Irenaeus, Bishop of Lyon in Gaul (now France). The work is also known as On the Detection and Overthrow of the So-Called Gnosis.
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